EE WAS INITIALLY INJURED ON 5/22/02 BUT DID NOT SEEK MEDICAL ATTENTION. HE WAS CARRYING PINCH VALVES UP THREE DECKS OF STAIRS TO DO MAINTENANCE WORK. EE THEN SAUGHT MEDICAL ATTENTION ON 6/19/0 2 AND WAS GIVEN A 3 WEEK LIGHT DUTY RESTRICTION.HE HAS SINCE BEEN RETURNED TO FULL DUTY AS OF 7/15/02. EE WAS ADVISED TO USE OTHER MEANS FOR LIFTING.